Patent
1993-03-08
1993-12-14
Adams, Russell E.
3541951, 354105, G03B 700
Patent
active
052707660
ABSTRACT:
An electric zoom camera comprises a photographing lens system having a zoom lens system, detecting device for detecting a focal length of the photographing lens system and generating a corresponding output, device for driving the photographing lens system for zooming, a commanding means for generating a command for executing zooming to the driving to device, and a control device for controlling the driving device, in accordance with the output from the detecting device and the command, to change a focal length of the photographing lens stepwise between focal lengths of a plurality of predetermined focal lengths arranged substantially in accordance with a geometric progression.
REFERENCES:
patent: 4652104 (1987-03-01), Harvey
patent: 4678299 (1987-07-01), Harvey
patent: 4896177 (1990-01-01), Kazami et al.
patent: 5060006 (1991-10-01), Taniguchi et al.
patent: 5097285 (1992-03-01), Wakabayashi et al.
Daitoku Koichi
Kazami Kazuyuki
Miyamoto Hidenori
Nakamura Toshiyuki
Adams Russell E.
Nikon Corporation
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